Mechanical properties of laser welded semi-solid metal cast A356 alloy

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dc.contributor.advisorKnutsen, Robert Den_ZA
dc.contributor.authorKunene, Gordon Nhlanhlaen_ZA
dc.date.accessioned2014-07-31T10:21:48Z
dc.date.available2014-07-31T10:21:48Z
dc.date.issued2008en_ZA
dc.descriptionIncludes bibliographical references.
dc.descriptionIncludes bibliographical references (leaves 96-103).
dc.description.abstractThe high usage of Al and its alloys in both the automotive and aerospace industries is attributed to its excellent specific strength and corrosion resistance. High demand of Al usage has led to the improvement of both the casting techniques and joining processes, in order to improve on the quality of the final product. The selection of the manufacturing process for Al and its alloys is based on the capabilities of the specified requirements for components and the alloy used. High pressure die casting (HPDC) is the most widely used casting process in the automotive industry due to its high production rate, and ability to produce complex shaped components. However, HPDC is prone to porosity making it difficult to heat treat and weld. Semi solid metal (SSM) forming has the potential to produce near-net-shape components with high integrity. Due to laminar filling characteristics of SSM HPDC, low porosity or porosity free castings can be produced. This offers the opportunity to apply heat treatment as well as weld the SSM HPDC components. A high continuous wave Nd: YAG laser has been used to investigate the weldability of SSM cast A356 alloy. The CSIR rheo-process was used to prepare the aluminium A356 SSM slurries and thereafter plates (4X80X100 mm3) were cast using a 50 Ton Edgewick HPDC machine. Plates in the as cast, T4 and T6 heat treatment conditions which had passed radiography inspection were then laser welded. Some of the initial as-cast plates that were welded were subjected to pre or post weld T4 or T6 heat treatment and are referred to as pre-weld T4 or pre-weld T6 and post-weld T4 or post-weld T6 specimens.en_ZA
dc.identifier.apacitationKunene, G. N. (2008). <i>Mechanical properties of laser welded semi-solid metal cast A356 alloy</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering. Retrieved from http://hdl.handle.net/11427/4964en_ZA
dc.identifier.chicagocitationKunene, Gordon Nhlanhla. <i>"Mechanical properties of laser welded semi-solid metal cast A356 alloy."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 2008. http://hdl.handle.net/11427/4964en_ZA
dc.identifier.citationKunene, G. 2008. Mechanical properties of laser welded semi-solid metal cast A356 alloy. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Kunene, Gordon Nhlanhla AB - The high usage of Al and its alloys in both the automotive and aerospace industries is attributed to its excellent specific strength and corrosion resistance. High demand of Al usage has led to the improvement of both the casting techniques and joining processes, in order to improve on the quality of the final product. The selection of the manufacturing process for Al and its alloys is based on the capabilities of the specified requirements for components and the alloy used. High pressure die casting (HPDC) is the most widely used casting process in the automotive industry due to its high production rate, and ability to produce complex shaped components. However, HPDC is prone to porosity making it difficult to heat treat and weld. Semi solid metal (SSM) forming has the potential to produce near-net-shape components with high integrity. Due to laminar filling characteristics of SSM HPDC, low porosity or porosity free castings can be produced. This offers the opportunity to apply heat treatment as well as weld the SSM HPDC components. A high continuous wave Nd: YAG laser has been used to investigate the weldability of SSM cast A356 alloy. The CSIR rheo-process was used to prepare the aluminium A356 SSM slurries and thereafter plates (4X80X100 mm3) were cast using a 50 Ton Edgewick HPDC machine. Plates in the as cast, T4 and T6 heat treatment conditions which had passed radiography inspection were then laser welded. Some of the initial as-cast plates that were welded were subjected to pre or post weld T4 or T6 heat treatment and are referred to as pre-weld T4 or pre-weld T6 and post-weld T4 or post-weld T6 specimens. DA - 2008 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2008 T1 - Mechanical properties of laser welded semi-solid metal cast A356 alloy TI - Mechanical properties of laser welded semi-solid metal cast A356 alloy UR - http://hdl.handle.net/11427/4964 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/4964
dc.identifier.vancouvercitationKunene GN. Mechanical properties of laser welded semi-solid metal cast A356 alloy. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Centre for Materials Engineering, 2008 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/4964en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentCentre for Materials Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherMaterials Engineeringen_ZA
dc.titleMechanical properties of laser welded semi-solid metal cast A356 alloyen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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